BBM MZ SERIES ZERO-TURN MOWER. Manual - part 7

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KAWASAKI

This machine has an oil drain hose installed on the engine to allow 
for easer oil changes. Bad Boy recommends that the oil and filter 
be changed after the initial 8 hrs of use, and at intervals of 50 usage 
hours or yearly, which ever occurs first after that. The oil capacity is 
2 quarts. Bad Boy 10W-30 synthetic blend engine oil is 
recommended for maximum protection.
3.1 Changing your engine oil and oil filter:

1) Remove oil dipstick and open oil drain using a 

10 mm socket or a flat head screwdriver until 
oil begins flowing. Allow oil to completely drain.
(Make sure to have an oil pan ready to capture 
old oil and properly dispose old oil.)

2) The oil filter is located on the right side of the 

engine. Clean area around oil filter. Place a 
container under the oil filter to capture any oil 
and remove filter. Wipe off mounting surface 
and reinstall drain plug. Torque to 10 ft*-lb.

3) Place new filter in shallow pan with

open end up. Fill with new oil until oil reaches 
the bottom of the threads. Allow 2 minutes for 
oil to be absorbed by filter material.

4) Apply a thin film of clean oil to rubber gasket 

on new filter

5) Refer to instructions on oil filter for proper 

installation.

6) Fill crankcase with approximately 2 quarts of 

new oil. Level should top of indicator on 

dipstick.

7) Reinstall oil fill/dipstick and tighten securely.
8) Start engine; check for oil leaks. Stop Engine; 

correct oil leaks. Recheck oil level.

9) Dispose of used oil and filter in accordance 

with local ordinances. 

Oil Dipstick

Oil Filter

and 

Drain

Air Filter

Spark Plugs

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1) Locate your fuel filter and mark the direction it is facing.

2) Clamp each side of the fuel filter to minimize and gas spills.

3) Remove the clips from each side of the fuel filter and remove the

fuel filter.

4) Place the new fuel filter in the same direction as the old and

place clips back into place and remove clamps.

The fuel filter is located in the fuel line on the left side of the engine 
by the starter motor. Replace the filter yearly. Prior to the removal 
of the old filter, note the direction of fuel flow as indicated on the 
filter. Have towels readily available in order to quickly remove any 
fuel leakage. Always use new hose clamps and ensure the security 
of the new filter by lightly pulling on each hose. Always perform 
maintenance outdoors or in a well ventilated area. Do not smoke or 
allow any open flames in the vicinity of any maintenance activities. 

3.2 Changing your fuel filter:

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The air cleaner is the engine’s only defense against damaging 
foreign particles. It is very important that the air cleaner element is 
inspected prior to each use. Remove the element and tap its sides 
in order to remove debris. Do not blow the filter out using 
compressed air. Doing so will greatly reduce the air cleaners 
effectiveness. Replace yearly; more often in dusty environments. 
Adhering to these practices will help prevent loss of power and 
premature engine failure. 

3.3 Changing the air cleaner:

1) Locate the air filter and lift up the cover.

2) Loosen the tensioner on the right side of the air filter.

3) Clean or replace paper element.

4) Place the paper element back into place and tighten the

tensioner.

5) Place cover back to original position.

Lift to Access Air Filter

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3.4 Changing the spark plugs and checking the spark plug gap:

1) Remove the wire on the spark plug and use a

13/16” socket to remove the spark plug.

2) Check the gap on the spark plug to verify that it is

0.03 in using a feeler gauge.

3) If the spark plug is worn, overheated, wet or carbon

fouled replace the spark plug.

4) Install the plug into cylinder head and torque to 16

ft*lbs. Be careful not to overtighten the spark plug.